Reverse Lampion

I hunt for it after finishing all 999 quests..
Usually I get 2~6 in an hour with 2x drop card from 'The pupil of oblivion'.

Now that's a good drop rate. You could train in Leafre for 100 hours with a 2x drop card and never find one scale. Making the assumption you get one about every 15 minutes and 1 dragon scale every 100 hours, that means if Pieces of Time are at the same drop rate of dragon scales in other versions, MSEA has a 400x greater drop rate. I doubt they increased it that much.